What causes air masses? An air mass forms whenever the atmosphere remains in contact with a large, relatively uniform land or sea surface for a time sufficiently long to acquire the temperature and moisture properties of that surface. The Earth’s major air masses originate in polar or subtropical latitudes. What is the air mass classification […]
Can you get struck by lightning in the bathtub?
Can you get struck by lightning in the bathtub? Most people hit by lightning are outside. But, according to Snopes.com, lightning striking into the ground near homes has sent electricity up pipes and into sinks and bathtubs. However, incidents like this are uncommon because rarely is someone doing dishes or showering at the “precise moment […]
What is the importance of metastable state?
What is the importance of metastable state? In a three-level laser, the material is first excited to a short-lived high-energy state that spontaneously drops to a somewhat lower-energy state with an unusually long lifetime, called a metastable state. The metastable state is important because it traps and holds the excitation energy, building up a… What […]
What are three scientific theories?
What are three scientific theories? Examples of scientific theories in different areas of science include: Astronomy: Big Bang Theory. Biology: Cell Theory; Theory of Evolution; Germ Theory of Disease. Chemistry: Atomic Theory; Kinetic Theory of Gases. Physics: General Relativity; Special Relativity; Theory of Relativity; Quantum Field Theory. What makes a bad scientific theory? Bad scientific […]
What happens if you add a second pulley to a pulley system?
What happens if you add a second pulley to a pulley system? The powerful mechanical advantage of a pulley is in using many pulleys at once. Combining multiple pulleys decreases the amount of force necessary to move an object by increasing the amount of rope used to raise the object. How does a single movable […]
Which is appropriate for a helicopter approaching an airport for landing?
Which is appropriate for a helicopter approaching an airport for landing? If not otherwise authorized or directed by the tower, pilots of fixed-wing aircraft approaching to land must circle the airport to the left. Pilots approaching to land in a helicopter must avoid the flow of fixed-wing traffic. What is the minimum ceiling requirement for […]
Which is the best example of heat being transferred mainly by radiation?
Which is the best example of heat being transferred mainly by radiation? Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of the Earth by the Sun. A less obvious example is thermal radiation from the human […]
How many plates are on Mars?
How many plates are on Mars? two plates Is Olympus Mons still growing? Scientists posit that Olympus Mons is still a fairly young volcano from a geologic standpoint, estimating it to be only a few million years old. That being said, there’s a good chance that it’s still active and could erupt at some point […]
What nerve makes the heart beat slower?
What nerve makes the heart beat slower? The word “vagal” refers to the vagus nerve. It’s a long nerve that runs from the brain down through the chest and into the abdomen. The vagus nerve has several functions, including slowing the heart rate. Can your heart continue to beat even if your cerebrum is not […]